> Ned, this is why I'd like issue33048 to be solved :-) Having to rely on the buildbot fleet for bugfix iteration is not convenient at all.

I want to see it solved, too. :-)  But there are other core-devs out there who are in a better position to solve it at the moment; it's not particularly a macOS problem; it's a problem with using Homebrew and Travis, neither one of which I'm all that familiar with and which others have set up.  And I'm in the middle of trying to get some releases and other stuff out the door.  So, I'm not going to be able to spend time on it right now.  Sorry!